Two substances of relative densities d1&d2 are mixed in equal volume and the relative density of the mixture is 4.when they are mixed in equal masses, the relative density of the mixture is 3.then the values of d1&d2 are
A body of density d and volume V floats with volume V1 of it immersed in a liquid of density d1 and rest of the volume V2 immersed in another liquid of density d2(<d1) then V1 is